Power-transmitting mechanism.



PATENTED MAR. 31. 1903..

F. SEDIVY. POWER TRANSMITTING MECHANISM.

APPLICATION FILED 0012 1902.

INIIIIIIIIHIIIHHI No. 724,338. PATENTED MAR. 31, 1903.

F. SEDIVY. POWER TRANSMITTING MECHANISM. PPPPPPPPPPPPPPPPP 012.2, 1902.

3 SHEETS-SHEET 3.

PATBNTED 31, 1903.

F. SEDIVY. POWER TRANSMITTING MECHANISM.

APPLIGATION FI LED OGT.2, 1902.

1 7.4; Zd/ f' N0 MODEL.

A FTORN-E YS.

UNITED. STATES PATENT OFFICE.

FRANK snoivv, or GLOBE, ARIZONA TERRITORY.

*POWER- TR-ANSMITTING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 724,338, dated. March 31, 1903.

Application filed October 2, 1902. Serial No. 125,653. (No model.)

To all whom it may concern:

Be it known that I, FRANK SEDIVY, resid tion, in which the operation ofconverting the motion is entirely automatic and positive.

Generically, my invention comprehends a' rotary shaft having duplex or bisecti ng screwways in its periphery mounted in suitable bearings and provided with means whereby a continuous rotary motion may be imparted thereto mechanically or manually, stationary frame portions, atraveler suitably mounted on the screw gear or shaft, carrying independently-operable detents at each end, arranged to be alternately moved into and out of engagement with the threadways in the screw-shaft, said traveler also having attached means for transmitting its reciprocal motive power to a supplemental mechanism, and trip devices mounted upon the stationary framing for shifting the independently-oper-' able detent devices mounted on the traveler automatically at predetermined intervals.

In its more subordinate features my invention consists in certain novel details of construction and peculiar combination of parts,-

all of which will hereinafter be fullyex plained, and specifically pointed out in the appended claims, reference being had to the accompanying drawings, in which- Figure 1 is a side elevation illustrating-my! invention, with the several parts thereof especially arranged for operating an air-compressing means. Fig. 2 is a transverse section thereof, taken on the line 2 2 of Fig. 1. Fig. 3 is a longitudinal section on the line 3 3 of Fig. 2 and illustrates the preferred construction of trip devices for engaging and shifting the traveler-carried detents. Fig. 4 is a view of one of the trip mechanisms and illustrates the traveler as having reached the limit of its movement in the-direction of the arrow and the trip devicesas engagingthe detent to move the same into contact with the tail view of one section of one of the inclined guides that form a part of the trip mechan- ,ism. Fig. 8 is a view of one of the shifting or tripper springs that cooperate with the inclined guides. Fig. 9 is a detail view of a modified form of the trip devices hereinafter explained.

In the accompanying drawings I have illustrated an operative arrangement of my motion converting and power transmitting mechanism; but I desire it understood that the structure shown may readily be modified and changed in detail to suit the particular purpose for which my power-transmitting and motion-converting means may be utilized without departing from my invention as set out in the appended claims.

In the drawings I have shown the screw gear or shaft 1 disposed horizon tally and journaled in end portions 2 2 of a supportingframe, which includes a number of horizontal beams 2 2, that join the ends 2 2 of the frame and which are equidistantly disposed radially about the axis of the screw gear or shaft 1.'

The shaftl at one end has a drive-pulley 1 or crank-handle, and at a suitable point, preferably'at the otherend, it has a balancewheel 3. That part of the shaft 1 between the framemembersZ 2 is in the nature of a duplex screw-gear, (designated by 2 which is formed by prod ucing a duplex series of screwthreads thereon, one set of which crosses or bisects the other, as clearly shown in Figs. 1 and 3, whereby a series of continuous spiral threadways X, having a parallel pitch in one direction, and another like set of threadways Y, having a reverse pitch, are provided.

That part of the shaft 1 which projects beyond the inner frame member 2 is smooth, as indicated at 2, to accommodate a crosshead 4, slidable thereon, which head is util- I shown a pump-cylinder P, mounted in the smooth part of the shaft 1, and a piston there for joined with thecross-head4, whereby air may be pumped under pressure into a storage-tank T, connected with the pump-cylinder 1, which latter in practice has valves suitably arranged in any well-known manner for the ingress and egress of air.

While I have shown my invention as adapted for operating an air-'compressor,it is manifest the reciprocal movement of the crosshead may be utilized for various other mechanical purposes.

The cross-head 4 is joined to the traveler 5, and the latter consists of a drum mounted upon the screw-shaftl to freely slide thereon, and the said traveler has a series of diagonal spirally-disposed slots at a a at one end, the pitch of which is in the direction of and parallel with the pitch of one set of threadways X in the shaft 1, and thetraveler also has a similar set of slots 1) b b at the opposite end, the pitch of which is reverse to that of the slots at 0; a and in a plane parallel with the threadways Y.

In the drawings I have shown three slots in each set, such number being shown to register with the number of threadways in each set X Y on the shaft 1, it being understood that if it is desired to move the traveler rapidly the shaft is made of a large diameter, while the threads are made of an increased pitch, it being obvious that in all cases it is preferred to form the opposite ends of the traveler 5 with as many slots as there are spiral threads in each set of threadways on the shaft 1.

With each set of slots a a a and b b b is cooperatively joined a series of detents, one

for each slot, and said detents are designated by C O C and D D D It will be noticed in the drawings the slots at the opposite ends are disposed in the same longitudinal planes, such arrangement being provided for conveniently joining the opposing detents in pairs-that is, the one C with the opposite one D, O with D, and O with D the connection for each pair being in the nature of a walking-beam E, centrally pivoted to a projected bifurcated bearing 6, extended radially from the traveler 5, and to the ends of the said beams E the oppositely-operating detents are pivotally connected, as shown.

So far as described the operation of the partsis as follows: In starting the mechanism all of the beams E are tilted to pull all the detents at one end of the traveler outof engagement with their cooperating threadways, and the detents at the other end of the traveler are pushed inward to engage their respective threadways, which, for example,

row 10, and in thus moving the cross-headconnected with the'traveler transmits power in the same direction. This movement of the traveler continues to a predetermined point, when the walking-beams E of all of the detents are tilted, and the detents in engagement with the threadways X are disengaged therefrom, and the other set of detents are *moved to engage with the threadways Y, and

each of the detents, consists of a pair of studs 15, secured to and projected radially from the traveler 5. To the outer end of said studs is fixedly connected an inwardly-inclined guideway, consisting of a pair of opposing members 16 16,- spaced apart to form a slotway 16 therebetween, and each of the members 16 includes a vertical or side guide-flange 16" and a horizontal guide member 16, the

upper extremity of which is beveled, as at 16", and the lower portion of which is in the nature of a springheld hinged member 16 adapted to yield in an upward direction, the

reason for which will presently appear.

Each guideway 16 is disposed in the longitudinal plane of the traveler, and the guideways at one end project from the traveler in one direction and those at the other end in an opposite direction, and each opposing pair of said guideways is disposed in radial alinement with the'adjacently-disposed stationary portions 2 of the supporting-frame, as clearly shown in Fig. 2.

It will be noticed from Fig. 4 the upper or beveled end of each of the guideways terminates over one extremity of their coacting walking-beams E, and the ends E of said beams are formed with extensions 6 dovetailed in cross-section to coact with restraining-springs 17, each of which is provided with a pair of spring-fingers 17,,projected radially. from the traveler, one set at each end of its detent-receiving slots. The spring-fingers are held to straddle the coacting ends of the ders E", which slip under the ends of the said At the inner side of each frame portion 2 2 and the said members 20 are-so arranged correlatively with the inclined guides that in 7 one direction of movement of the traveler the portion 20 thereof rides in the slotway of the guide 16 and with their studs 20 in engagement with the upper face of the guideflanges 16, it being understood that by reason of the incline of the guides 16 the springs 20 will be constantly moved back under increased tension until the upper beveled edge of the guides 16 is reached, when by reason of the pressure on the springs 20 the ends 20 will snap down back of the guides 16 and in their movement first engage with and spread the spring-fingers 17 17, and thereby free the coincident end of the walking-beam E, which was previously held locked, and then engage the said end and force it inward to bring its detent into engagement with the screw-gear, it being understood that by reason of the pivotal connection of the beam E at the same time the aforesaid end is moved inward the other end of the beam, together with its detent, will be moved outward to disengage the said other detent from the screwgear and move the said other end of the beam into a locked engagement with its cooperating spring-fingers 17.

On the reverse movement of, the traveler the spring 20, last referred to, will slip under the inclined guide and move outwardly under the same until it moves into engagement with the lower end of said guide. The hinged portion of the guide will yield sufficiently to permit the studs20. of the spring end 20 to readily slip upwardly and on the return movement of the traveler again move into engagement with the upper end of the guidetlanges 16".

In Fig. 9 I have illustrated a slightly-modified construction of the detent devices, the operation of which is similar to that of the preferred form described; but in the said modified form a single stud or post is projected radially from the traveler, one for each detent-receiving slot, and which is indicated by 25, the outer end of which is bifurcated to receive a centrally-pivoted pawl 26, which is held in engagement with the springs 20, which in the present construction is not-equipped with lateral studs, as in the other form, and one end of the pawl 26 is held to coact with the spring-fingers 17 and the coincident end of the detent-carrying beam, and the other end of the pawl extends forward of the bifur cated bearing engaging its fulcrum. In this latter form of trip devicesin one direction of movement of the traveler the spring 2O engages the pawl 26 until the bearing of said spring is at a point inside of the fulcrum of the pawl 26, when the spring-pressure on the pawl rocks the said pawl and causes it to spread the fingers 17 to release that end of the beam E that engages the same and then press the freed end of the beam with its detent inward, the pawl at the opposite end of the beam E at this time being shifted to its opposite or reverse position, as shown.

From the foregoing, taken in connection with the accompanying drawings,it is believed the complete operation and construction of my invention will be readily understood.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. A mechanism of the character described, comprising, a suitable supporting-frame, a continuously-rotatable screw-gear journaled therein, said gear including independent intersecting and reversely-inclined threadways, a traveler loosely slidable over the said gear, means mounted on the traveler for interlocking it with the screw-gear, said means including spring-controlled automatically-operating independent detents, one for each threadway for alternately moving into and out of engagement with the independent reverselyinclined threadways in the screw-gear, for the purposes described.

2. In a mechanism as described, the combination with a continuously-rotatable screwgear, consisting of a shaft having a series of independentintersecting threadways inclined in reverse directions, a traveler reciprocally mounted on the screw-gear, detent mechanism in each end thereof for engaging the threadways in the screw-gear, the detents at one end being arranged to engage one set of threadways, and the detents on the other end to engage with the other or reverse set of threadways, and spring-controlled automatically-operating trip devices for the said detents operable by the reciprocal movement of the traveler for moving the opposing detent devices alternately into and out of engagement with their respective threadways in the screw-gear, all being arranged substantially as shown and described.

3. In a mechanism as described, the combi-' nation with the screw-gear, having a threadway X in one direction, and a threadway Y in a reverse direction, the two threadways intersecting each other; of a power-transmit-v ting traveler freely slidable on the said gear, said traveler having a slotat one end in the plane of the threadway X, and a similar slot I in the other end in the-plane of the thread- Way Y, a detent operable through each slot to cooperate with the threadways X and Y,

a walking-beam mounted on the traveler,.

to the opposite ends of which the aforesaid detents are connected, and spring-controlled automatically-operating trip mechanism forengaging the walking-beam at predetermined intervals to tilt the same, whereby to mot e one detent into an interlocked engagement &

with its respective threadway on the screwgear, and the other detent out of engagement with its threadway, for the purposes specified.

4:. In a mechanism as described, the combination with the continuously-rotatable screwgear, said gear having a threadway X running in one direction and a threadway Y intersecting the threadway X, and running in the reverse direction thereto, a power-transmitting member, a pair of oppositely-operable detents mounted thereon, one of which is arranged to cooperate with the threadway X, and the other with the threadway Y, springcontrolled automatically operable detent mechanism for moving one detent out of engagement with its coacting threadway, and

. simultaneously moving the other detent into a coacting engagement with its respective threadway, for the purposes described.

5. In a mechanism as described, the combination with the screw-gear, including the intersecting threadways X and Y; of a traveler reciprocally slidable upon the screw-gear, a detent mounted on one end of the traveler to engage the threadway X, a second detent in the other end of the traveler for engaging the threadway Y, an automatically-operating tripper mechanism for simultaneously shifting the two detents in reverse directions, whereby as one detent is moved into engagementwith its respective threadway, the other detent will be moved out of engagement with its coacting threadway, an automatically-operating lock device for holding the withdrawn detent to its adjusted position, the aforesaid trip mechanism being governed by the reciprocal movement of the'traveler, and including a member adapted to first trip the lock device to release the withdrawn detent, and then engage the said released detent and move it to its thread-engaging position, and means for joining the two deten ts whereby to operate them in unison, in the manner and for the purposes described.

FRANK SEDIVY. Witnesses:

JAMES W. BRoDERIoK, KNIGHT PARKER. 

